1/* SPDX-License-Identifier: GPL-2.0-only */
 2/* Copyright (c) 2016 Facebook
 3 */
 4#ifndef __PERCPU_FREELIST_H__
 5#define __PERCPU_FREELIST_H__
 6#include <linux/spinlock.h>
 7#include <linux/percpu.h>
 8
 9struct pcpu_freelist_head {
10	struct pcpu_freelist_node *first;
11	raw_spinlock_t lock;
12};
13
14struct pcpu_freelist {
15	struct pcpu_freelist_head __percpu *freelist;
16};
17
18struct pcpu_freelist_node {
19	struct pcpu_freelist_node *next;
20};
21
22/* pcpu_freelist_* do spin_lock_irqsave. */
23void pcpu_freelist_push(struct pcpu_freelist *, struct pcpu_freelist_node *);
24struct pcpu_freelist_node *pcpu_freelist_pop(struct pcpu_freelist *);
25/* __pcpu_freelist_* do spin_lock only. caller must disable irqs. */
26void __pcpu_freelist_push(struct pcpu_freelist *, struct pcpu_freelist_node *);
27struct pcpu_freelist_node *__pcpu_freelist_pop(struct pcpu_freelist *);
28void pcpu_freelist_populate(struct pcpu_freelist *s, void *buf, u32 elem_size,
29			    u32 nr_elems);
30int pcpu_freelist_init(struct pcpu_freelist *);
31void pcpu_freelist_destroy(struct pcpu_freelist *s);
32#endif